首页
登录
职称英语
Certainly no creature in the sea is odder than the common sea cucumber. All
Certainly no creature in the sea is odder than the common sea cucumber. All
游客
2023-11-04
48
管理
问题
Certainly no creature in the sea is odder than the common sea cucumber. All living creatures, especially human beings, have their peculiarities, but everything about the little sea cucumber seems unusual. What else can be said about it is: a bizarre animal that, among other eccentricities, eats mud, feeds almost continuously day and night but can live without eating for long periods, and can be poisonous but is considered supremely edible by gourmets.
For some fifty million years, despite all its eccentricities, the sea cucumber has subsisted on its diet of mud. It is adaptable enough to live attached to rocks by its tube feet, under rocks in shallow water, or on the surface of mud flats.
Common in cool water on both Atlantic and Pacific shores, it has the ability to suck up mud or sand and digest whatever nutrients are present.
Sea cucumbers come in a variety of colors, ranging from black to reddish-brown to sand-color and white. One form even has vivid purple tentacles. Usually the creatures are cucumber-shaped hence their name and because they are typically rock inhabitants, this shape, combined with flexibility, enables them to squeeze into crevices where they are safe from predators and ocean currents.
Although they have voracious appetites, eating day and night, sea cucumbers have the capacity to become motionless and live at a low metabolic rate — feeding sparingly or not at all for long periods, so that the marine organisms that provide their food have a chance to multiply. If it were not for this faculty, they would devour all the food available in short time and would probably starve themselves out of existence.
But the most spectacular thing about the sea cucumber is the way it defends itself. Its major enemies are fish and crabs. When attacked, it squirts all its internal organs into the water. It also casts off attached structures such as tentacles. The sea cucumber will eviscerate and regenerate itself when it is attacked or even touched; it will do the same if the surrounding water temperature is too high or if the water becomes too polluted. [br] The passage mainly discusses
选项
A、the reason for the sea cucumber’s name.
B、what makes the sea cucumber unusual.
C、how to identify the sea cucumber.
D、places where the sea cucumber can be.
答案
B
解析
文章第一段第一句指出,海参是海洋中最奇特的生物,随后从各段的首句可以看出,作者从其食物种类、外形、生活习性及防卫方式等方面证明了这一点,由此可知答案为[B]。而其他三个选项都过于片面,不能概括全文的中心思想。
转载请注明原文地址:https://tihaiku.com/zcyy/3157659.html
相关试题推荐
WhatisNOTtrueaboutthenewlydiscoveredfossils?A、Thecreatureinfossilsli
Nowcustomhasnotbeencommonlyregardedasasubjectofanygreatimportan
Nowcustomhasnotbeencommonlyregardedasasubjectofanygreatimportan
Nowcustomhasnotbeencommonlyregardedasasubjectofanygreatimportan
Nowcustomhasnotbeencommonlyregardedasasubjectofanygreatimportan
Nowcustomhasnotbeencommonlyregardedasasubjectofanygreatimportan
Nowcustomhasnotbeencommonlyregardedasasubjectofanygreatimportan
Nowcustomhasnotbeencommonlyregardedasasubjectofanygreatimportan
Nowcustomhasnotbeencommonlyregardedasasubjectofanygreatimportan
Nowcustomhasnotbeencommonlyregardedasasubjectofanygreatimportan
随机试题
[originaltext]LiHua:Pardonme.I’mtryingtofindarticlesonecology.Canyo
[originaltext]TheAmericanpatentsystem,providedforintheConstitution,
固定义齿修复中,倾斜度在多少范围内的牙齿仍可以选作基牙A.6° B.45°
基金销售机构应当建立基金销售适用性管理制度,至少包括的内容有()。 Ⅰ.对基
心电图对鉴别心肌梗死和心绞痛最有意义的改变是A.ST段弓背向上抬高 B.T波呈
SF6断路器瓷套或绝缘子有开裂、放电声或严重电晕定性为严重缺陷。
我们日常生活中的手机,车载导航系统等经常用到的GPS,请问GPS的全称是:()
掌握学习
股份有限公司董事、监事、高级管理人员在任职期间每年转让的股份不得超过其所持有本公
处方开具当日有效。特殊情况下可以延长有效期。但有效期最长不得超过A.2天 B.
最新回复
(
0
)